The Cereals in AmericaOrange Judd Company, 1912 - 421 páginas |
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Página x
... variation , p . 19 ; Influence of environment , p . 19 ; Change of seed , p . 20 ; Crossing , p . 21 ; Selection , p . 21 ; Power of specific forms to repro- duce themselves , p . 22 ; Importance of large num- bers ; p . 23 . Plant ...
... variation , p . 19 ; Influence of environment , p . 19 ; Change of seed , p . 20 ; Crossing , p . 21 ; Selection , p . 21 ; Power of specific forms to repro- duce themselves , p . 22 ; Importance of large num- bers ; p . 23 . Plant ...
Página 10
... variation in the adaptability of different soils under the same climatic conditions . Certain soils are much better adapted to wheat and grass than for maize and potatoes , while other soils are much better adapted to maize and potatoes ...
... variation in the adaptability of different soils under the same climatic conditions . Certain soils are much better adapted to wheat and grass than for maize and potatoes , while other soils are much better adapted to maize and potatoes ...
Página 18
... variations that were considered desirable by the gardener without any conscious attempt to produce these specific forms . 37. Examples of Definite Improvement . - The sugar beet is an illustration of systematic breeding to bring about a ...
... variations that were considered desirable by the gardener without any conscious attempt to produce these specific forms . 37. Examples of Definite Improvement . - The sugar beet is an illustration of systematic breeding to bring about a ...
Página 19
... Variation . - Variation is the basis of selec- tion . Plants must vary or they could not be selected . There are two general methods of producing variations , viz .: I. Environment , such as soil , climate , space , cultivation , etc. 2 ...
... Variation . - Variation is the basis of selec- tion . Plants must vary or they could not be selected . There are two general methods of producing variations , viz .: I. Environment , such as soil , climate , space , cultivation , etc. 2 ...
Página 21
... variation . Yield in grains of 100 plants , showing greater variation in yield of hybrid wheat than of either parent form . The yield of the hybrid is indicated by the line marked -x- ( After Hays . ) Crossing is also employed not only ...
... variation . Yield in grains of 100 plants , showing greater variation in yield of hybrid wheat than of either parent form . The yield of the hybrid is indicated by the line marked -x- ( After Hays . ) Crossing is also employed not only ...
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Términos y frases comunes
aleurone aleurone layer average barley bran breeding bushels bushels per acre carpels cent cereals chinch bug climate color common wheat corn crop crude fiber culm cultivated dent maize drill dry matter ears embryo endosperm feet fertilizers field five flour flowering glume fodder four germination gliadin glumes gluten grade grain grass grown growth harvested Hessian fly hull husk Illinois Station inches deep increase injury insects land less maize plant manure maturity medium method million bushels nitrogen North North Dakota oats obtained one-half outer glume panicle percentage plat plowing pollen pounds produced protein rachis rainfall Red Winter Wheat rice ripening roots rows season seed bed silage smut soil sowing sown species spike spikelets spring wheat stalks starch stover straw sweet maize tassel threshing tion U. S. Dept usually variation vary weeds winter wheat yellow yield of grain